180221-N-IO414-250 NAGASAKI, Japan (Feb. 21, 2018) Sailors assigned to the Avenger-class mine countermeasures ship USS Chief (MCM 14) launch a float to begin a mine sweep as part of a test of the ship's capabilities. Chief is undergoing readiness assessments prior to a Board of Inspection and Survey (INSURV) that will test the ship's ability to perform at sea. (U.S. Navy photo by Mass Communication Specialist 2nd Class Jordan Crouch/Released)